Exhaust-muffler for engines.



Patented Dec. I2, I899.

F. VAN UUZEN.

EXHAUST MUFFLER FOR ENGINES.

(Application filed Feb. 25, 1889.)

(No Model.)

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UNITED STATES PATENT OFFICE.

FRANK VAN DUZEN, OF MARION, OHIO.

EXHAUST-MUFFLER FOR ENGINES.

SPECIFICATION forming part of Letters Patent No. 638,776, dated December12, 1899.

Original application filed August 18,1898, Serial No. 688,920. Dividedand this application filed February 25, 1899. Serial No.

To all 2077 0771, it may concern:

Be it known that I, FRANK VAN DUZEN, a citizen of the United States, anda resident of the city of Marion, in the county of Marion and State ofOhio, have invented certain new and useful improvements inexhaust-mufflers for engines operated by the explosion of gas, gasolene,kerosene, and other coal-oils and hydrocarbons, of which the followingis a specification.

My invention relates to improvements in handling apparatus and the modeof operating the same.

The invention herein set forth was contained in an application forLetters Patent of the United States filed by me on August 18, 1898, inthe Patent Office of the United States, which application bore theserial number 688,920. A division of said application having beenrequired by the Commissioner of Patents, the invention first aforenamedhas been transferred to this specification.

The several features of my invention and the various advantagesresulting from their use conjointly or otherwise will be apparent fromthe following description and claim.

I In the drawings illustrating my invention I have shown it inconnection with that kind of a cylinder which has one open and oneclosed end, the moving power or impulse acting on one side of thepiston-via, between the piston and the closed head of the cylinder.

In the accompanying drawings, making a part of this application, and inwhich similar letters of reference indicate corresponding parts, Figure1 shows in elevation means of my invention for niuffiing the sound ofthe discharge of the gases passing from the engine and also shows inelevation certain portions of one of the various kinds of engines towhich my invention can be applied. Fig. 2 is a vertical section throughthe muliiing apparatus and the exhaust-passages, cylinder, andconnection-rod, but showing in elevation the crank-arm and a part of theflywheel. Fig. 3 is a top View of the mufflerchaniber, valve, valve-rod,lever, and a portion of the rod for operating this lever. Fig.

at is a section of one of the concentric cylinders of the muffiers,illustrating how the latter are perforated.

(No model.)

The cylinder A is shown provided with the usual water-jacket A Aindicates the cylinder-head. (Shown in Fig. 1, but omitted in Fig. 2.) Eindicates the piston, slidable within cylinder A. The crank-shaft E ofthe engine carries a fly-wheel E, the latter being shown in solid linesin Fig. 1 and in dotted lines in Fig. 2. The crank E is rigidlyconnected at one end to the shaft E and at the other end carries thecustomary crank-arm E, to which latter one end of the connectingrod orpitman E is pivotally connected. The other end of this connecting-rod Eis pivotally connected to the pivot-shaft E of the piston E The mode inwhich these parts operate is obvious and well known.

As the noise caused by the first explosion (or exhaust) of the engine,and, indeed, of the successive exhausts, may be disagreeable and in manycases be undesirable, particularly in frightening horses on the road orelsewhere when the same is used for traction or portable purposes, itbecomes desirable to provide means for deadening the sound of theexhaust on such occasions. Such means are as follows: As theexhaust-gases pass through the exit-port J of the engine and through thepassage J as soon as valve J is opened by suitable means I conduct theminto a muffier-reoeptaole K by connecting the passage J to themufller-shell. Between the end K and the end K are a series ofconcentric cylinders K each outer one larger than the preceding and aspace K being between each cylinder and the next one. These cylindersare held in place by the end K and the end K Through one cylinder nearits top is a row of perforations K, and near the bottom of the nextcylinder is a row of openings K, and so on, alternating until the outercylinder is reached, and then the final exit-holes K are in the end K orthe end K preferably in the latter. The end K has a valve K fixed to andhung on a rod K journaled in eyes or bearings K on the top of themufliing vessel. There is a lever K connected rigidly at one end to therod K and at the other end pivotally connected to the end of a pull rodor rope K preferably the former and to enable this to be set at adesired point there are notches in the rod adapted to engage a stud K,(see dotted lines,-Fig. 1,) located on a fixed portion of the apparatus.By moving the rod K in one direction the valve or damper K is opened,thus allowing the products of combustion to go directly out into theopen air by passing through the central portion of the muffler. In suchevent the exhaust has its full resonance of sound and the engine has itsfull Working power, as there is no back pressure on the exhaust. Bymoving the rod K in the opposite direction the damper K is closed andthe gases of the exhaust are compelled to travel through the holes K ofthe cylinders and the spaces K between them and the outlet-holes Kthereby breaking up and silencing the roar attendant upon the exhaustwhen allowed to escape directly from the engine.

\Vhat I claim as new and of my invention, and desire to secure byLetters Patent, is-

In an engine,the combination of an exhaust, and a mufiler consisting ofconcentric cylinders, with holes alternately at adjacent ends, and heldbetween plates, one of which has a hole of exit, the central passage ofthe muffler being in connection With the exhaust, and a valve forclosing this passage into the open

